refactors code

infra/binder/src/test/java/org/apache/shardingsphere/infra/binder/segment/expression/impl/InExpressionBinderTest.java

@@ -1,3 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.apache.shardingsphere.infra.binder.segment.expression.impl;
 
 import org.apache.shardingsphere.infra.binder.enums.SegmentType;
@@ -13,16 +30,15 @@
 
 import static org.mockito.Mockito.mock;
 
-public class InExpressionBinderTest {
+class InExpressionBinderTest {
 
     @InjectMocks
-    InExpressionBinder subject;
+    private InExpressionBinder subject;
 
     @Test
     void bindTest() {
         Map<String, TableSegmentBinderContext> tableBinderContexts = new LinkedHashMap<>();
         InExpression actual = subject.bind(mock(InExpression.class), mock(SegmentType.class), mock(SQLStatementBinderContext.class), tableBinderContexts);
-
         Assertions.assertInstanceOf(InExpression.class, actual);
     }
 }